As other commenters have mentioned, Source Maps are the solution to this problem in general. The main reason we don't yet allow signup to RescueJS is that "crea

As other commenters have mentioned, Source Maps are the solution to this problem in general. The main reason we don't yet allow signup to RescueJS is that "create a source map" is currently beyond the state of the art for web frameworks. You can't "just" do it. Over the weekend we spent a few hours trying to hook source maps into the asset pipeline for Rails based on https://github.com/sstephenson/sprockets/pull/311 https://github.com/sstephenson/sprockets/pull/311 and upgrading the 'uglifier' rubygem to work with UglifyJS2. We didn't manage to get it quite working within the time limit, but we'll try and push our work-in-progress upstream to get this ball moving again.